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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		System.out.println(print(4));
  13. 	}
  14.  
  15. 	static List<List<Integer>> print(int num) {
  16. 		List<Integer> list = new LinkedList<>();
  17. 		list.add(num);
  18. 		List<List<Integer>> ret = new LinkedList<>();
  19. 		ret.add(list);
  20. 		if(num == 1) return ret;
  21. 		for(int i=1;i<(num+1)/2;i++) {
  22. 			for(List<Integer> l1 : print(i)) {
  23. 				for(List<Integer> l2: print(num-i)) {
  24. 					List<Integer> ans = new LinkedList<>(l1);
  25. 					ans.addAll(l2);
  26. 					ret.add(ans);
  27. 				}
  28. 			}
  29. 		}
  30.  
  31. 		return ret;
  32. 	}
  33. }
Success #stdin #stdout 0.11s 320576KB
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Standard input is empty
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[[4], [1, 3], [1, 1, 2]]
https://ideone.com/uzS9nB
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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